denny



C..W. DENNY.

REINFORCED METAL.

APPLlcAioN FILED Nov. e, Isla.

Patented Nov. V2

2 SHEETS-SHE C. W. DENNY.

BAEINFORCED METAL.

APPLICATION FILED NOV. 6.1918., v

1,323, 1.67. Patented Nov. '25, 1919.

2 SHEETS-SHEET 2.

i w n W MOM.. V i

VCLAUDE WILLIAM DENNY, 0F LON DON, ENGLAND.

REINFOBCED METAL.

Specification of Letters Patent.v

Patented Nov. 25, 1919.

Application led November 6, 1918. Serial No. 261,382.

To all whom may concern:

Be it known that I, CLAUDE W1LLL1A-M DENNY, a subject of the King of Great Britain, residing at London, England, have invented certain new and useful Improvements in Reinforced Metals, of which the following is a specification.

Ihis invention relates to the productlon of composite or built-up metal plates, sheets, tubes or other articles, same being composed of two or more layers of diEerent metals, such as relatively soft and expensive metals like copper, lead, brass, aluminum and the like, reinforced with a base metal such as iron or steel to give strengthand stability' and also to economize in the use of the softer metal.

The. object of the present invention is an improved method of applying and securely uniting the layers ofthe different metals.

According to the ,said invention the reinforced or composite metal is produced by perforatin a metal plate or tube and apply` ing the so er covering metal to one or both sides thereof (the perforated plate being either in the flat or formed into a tube) by electro-deposition, so that the said covering metal enters the perforations of the plate or tube and is keyed or locked to the latter.

Figure 1 of the accompanying drawings is a section, and

Fig. 2 is an elevation, of a perforated foundation plate which is used in the production of a composite plate inl accordance with this invention, by a process of electrodeposition.

Fig. 3 is a section of the plate at one stage of the electro-deposition, the covering metal being in. the process of being built-up upon the foundation or core. i

Fig. 4 is a section of the finished composite or reinforced plate.

Fig. 5 shows a modification where the softer covering metal is applied to one side only of the foundation plate.

Fig. 6 represents the use of two foundation plates laid together, and

Fig. 7 shows how the covering metal is applied and keyed to the said two foundation plates. t

Fig. 8 illustrates the use of a foundation or core plate built up of several layers.

v Fig. 9 is a cross-section, and Fig. l0 an elevation, showing a tube adapted to form the foundation of a composite or built-up tube in accordance with this invention.

Referring to Figs. l to 4:, to produce a sheet or plate of reinforced copper or the like, a sheet of iron or steel (t is taken (Fig. l) which is perforated by punching circular holes b in it, or holes or slots of any suitable shape. Said holes b are preferably of a slightly taper formation, as shown.

The surface of the sheet a is now cleaned and prepared for electro-deposition by any of the well-known methods, and copper is deposited upon the surface of both sides of the sheet and upon the walls or sides of the holes b, as shown in Fig. 3. The copper c gradually builds up upon the iron or steel surface until the holes b are completely filled, as shown in Fig. 4, the two copper facings being securely keyed or locked to the iron or steel by the connecting parts c1 filling the said holes b. The composite sheet can now be worked up, after annealing, into manufactured article Instead of the copper c being applied upon both sides of the iron or steel plate a, it may be deposited upon one side only, as shown in Fig. 5, the taper holes b being arranged as shown, and being filled up by the copper, forming keys c1 integral with the copper facing c. Y*

Or, as represented in Figs. 6 and 7, two iron or steel plates a, a, may be placed back to back, with the larger diameters ofthe tapering holes b coinciding. The plates are then temporarily fixed together and copper is deposited upon them until the holes b are entirely lled, as seen in Fig. 7 the two facings of copper being joined together by the keys or connecting parts c1 filling the said holes.

Instead of thick iron or steel foundation plates beingv used the foundation may comprise two or more thin plates or layers, as shown in Fig. 8, where three such layers a are indicated. These thin plates are collectively punched with holes b and the copper facing c is electro-deposited in the manner previously described. With this construction a certain amount of flexibility is imparted to the composite plate.

In the application of the invention to tubes, as shown in Figsi 9 to 11, the main body of the tube may be made from a fiat strip or metal a, pierced With taper holes and bent up into tubular form, as in Fig. 9, the meeting edges being vWelded together. Copper is then deposited yby electrolysis upon the inside and outside faces, as at c, Fig. 11, the interior and exterior facings being joined together and locked to the tube a, by the integral connecting pieces c1 filling the holes b. The tube may be finished, if necessary, by drawing it through dies.

As shown in Fig. 13, the copper facing c may be applied only to the outside face of the tube a, being locked to the latter by the keying parts c1 filling the taper holes b.

Or, as seen in 'Fig 13, the copper c may be deposited only upon the inner face of the tube a and held to the latter by the keys c1 engaging the holes b.

In all cases the finished plates or articles may be improved by passing the saine through finishing rollers or by burnishing them mechanically.

Having fully described my invention, what I desire to claim and secure by Letters Patent is 1. The production of reinforced or composite metal sheets, plates, tubes and the like consisting in perforating a rigid metal foun dation and applying a softer covering metal to the surface of said foundation by electrodeposition in one continuous process, and so that the said covering metal enters and lls the perforations flush With the inain surface of the covering metal upon the non-perforated part of the foundation, and is niechanically locked to the said foundation.

2. The production of reinforced metal sheets, plates, tubes and the like consisting in forming tapered perforations in a rigid metal foundation and applying a softer covering metal to the surface of said foundation by a single continuous process of electro-deposition, so that the said covering metal enters and fills the tapered perforations flush with the main surface of thil covering metal upon the non-perforated part of the, foundation, andv is mechanically locked to the said foundation.

3. The manufacture of reinforced tubes consisting in perforating a rigid foundation plate of metal, bending it into a tubular form and joining the edges, and applying a covering metal by electro-deposition in a single continuous process, to the surface thereof, so that it enters and fills the perforations, producing a flush surface and is mechanically locked to Jthe perforated foundation.

In testimony whereof I have hereunto .set my hand in presence of tivo subscribing witnesses.

- CLAUDE IVILLIAM DENN Y.

Vitnesses:

PERcY S. CANE, L. A. NOWLAN. 

